A pair of parallel lines is cut by a transversal.

A pair of parallel lines is shown cut by a transversal. Angle A is located in the upper left exterior next to the transversal, and angle B is located in the bottom right exterior corner of the transversal.

If m∠A = (5x − 4)° and m∠B = (8x − 28)°, what is the value of x?

8
9.4
16.3
36